[pavel_lishin]

Perhaps a better version would have independent sound tracks of each ambient noise, so that you could adjust each individual part.

[thetrumanshow]

Or, at least different "flavors". I'd like to try "Busy Airport Terminal" and "Mall Scene".

For working parents, maybe a recording of your kids playing/fighting in the background. :)

[fumar]

Busy Airports reminds me of Brian Eno's Music for Airports.

https://www.youtube.com/watch?v=RfKcu_ze-60

[peterwwillis]

Brian Eno + "3d Rain" link above = Blade Runner. Now I want to nap.

[Kerrick]

Like http://www.ambient-mixer.com/ ? I've long used that website to give some atmosphere to my tabletop RPG sessions.